<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>ESP32</title>
    <h1 >led_red</h1>
    <p>GPIO state:
        <strong>
             '''+ gpio_red_state +''' 
        </strong>
    </p>
    <p>
        <span >开</span>
        <a href="/?led_red=on"><button class="button">ON</button>
        </a>
    </p>
    <p>
        <span >关</span>
        <a href="/?led_red=off"><button class="button button2">OFF</button>
        </a>
    </p>
    <h1 >led_yellow</h1>
    <p>GPIO state:
        <strong>
             '''+ gpio_yellow_state +''' 
        </strong>
    </p>
    <p>
        <span >开</span>
        <a href="/?led_yellow=on"><button class="button">ON</button>
        </a>
    </p>
    <p>
        <span >关</span>
        <a href="/?led_yellow=off"><button class="button button2">OFF</button>
        </a>
    </p>
</head>
<body>
'''